KR20180029933A - Immersion device for slag sample collection - Google Patents

Abstract

The present invention relates to an immersion apparatus (10, 20) for collecting a slag sample and measuring a molten metal parameter, wherein the immersion apparatus (10, 20) comprises an inlet for sending the molten slag (18) to the slag sample chamber (1) and (21) for measuring the parameters of the molten metal (19), wherein the inlet conduits (5, 25) and the measuring elements (1, 21) (10, 20) which is arranged at the upper end region of the immersion end of the immersion apparatus (10, 20) and / or facing the immersion direction (17). During the immersion in the molten slag 18 and in the molten metal 19 thereafter in the immersion direction 17 the molten slag 18 enters the external part of the inlet conduits 5 and 25 and the inlet conduit 5 , 25), and is sent to the slag sample chambers (7, 27). Thus, reliable slag collection and molten metal measurement can also be achieved in the converter. The present invention also relates to a method of collecting slag samples and measuring molten metal parameters.

Description

{IMMERSION DEVICE FOR SLAG SAMPLE COLLECTION}

The present invention relates to an immersion device for collecting slag samples and for measuring molten metal parameters, as well as a method for collecting slag samples and measuring molten metal parameters.

In most molten metal smelting processes, particularly steelmaking processes, molten slag is formed that forms a layer on the molten metal. The molten slag has a lower density than the molten metal. For this reason, molten slag generally floats and accumulates on the surface of the molten metal located in the processing vessel. The slag provides the requisite metallurgical function, such as the absorption of certain components that are desired to be removed from the molten slag, or the creation of a reaction environment in which components such as carbon are oxidized in the molten slag and released as gaseous by-products of the reaction.

In the metal manufacturing industry, monitoring the chemical and / or metallurgical composition of the smelting slag to effectively monitor the molten metal treatment, comparing the initial calculated chemistry to the actual composition to update the charge mass and mass balance model, It is important to efficiently collect and analyze slag in a timely manner to control the smelting process very well.

A conventional method for obtaining a sample of a smelting slag from a molten metal bath in a processing vessel is to immerse the slag in a relatively short period of time with predetermined metal objects such as pipes, metal spoons, metal chains and the like. Upon removal of the metal object from the treatment vessel, the solid slag is conveniently separated from the metal object, collected and cooled on a cold metal object so that the layer of molten slag can be analyzed without delay using known analytical methods and techniques. do.

A disadvantage of this method is that the sample consisting of small pieces, which can sometimes be mixed with fragments of the slag of the previous process batch at the collection location, is not fixed. By securing the process of collecting the frozen slag as taught in U.S. Patent 6,370,973 there is provided a funnel 4 that sends the liquid slag 31 through the mold inlet 3 to the sample chamber 2 with the cooling plate 5 ), A slag sample is obtained after removal from the sample chamber 2.

In addition, it is common in the metal manufacturing industry to monitor various other properties of molten metals in processing vessels, such as temperature, solidification temperature, dissolved oxygen amount, and the like, and to obtain physical samples to determine other component content. For example, many other types of devices or probes have been developed and used for such purposes, as disclosed in U.S. Patent No. 7,832,294. Typically, a measuring head containing sensing elements is mounted on a carrier tube, typically a cardboard tube, and is immersed in a molten metal bath. The cardboard tube supports the measuring head and / or the sampler to allow the sensor and / or sampler to be inserted into the molten metal at the desired depth below the molten slag to obtain the required data and / or physical sample. Where it is desired that a sample of slag floats on the molten metal, it is known to extract physical samples into the inlet conduits located on the sides of the hollow carrier tubes, as taught in U.S. Patent No. 5,415,052 and U.S. Patent No. 9,176,027 have. Alternatively, it is known to fix a generally cylindrical metal in a fixed position to a cardboard tube, such as a metal tube or metal coil, as in U.S. Pat. No. 5,435,196 or U.S. Pat. No. 7,621,191. In this way, when the probe body is inserted or immersed in a molten metal bath to make necessary measurements at the tip during smelting, a sample of the slag can be obtained simultaneously on the side, and when the probe body is taken out of the molten metal bath, .

The method of obtaining the sample of slag described above may be useful in some applications, but it may be beneficial for the metal object used to collect the sample of slag to actually be held in the slag layer and to enter the molten metal below the slag layer through the slag , It is generally difficult to use because it is necessary to adjust the immersion process in accordance with the exact position and depth of the slag.

Another problem relates to the collection of slag samples from a steel producing converter. A converter is a furnace that produces steel from scrap iron, impure steel and / or iron as well as iron. Fused iron is added to scrap iron, impure iron and / or steel. Oxygen and especially high-pressure streams of high pressure are blown through the mixture, causing a chemical reaction and removing some carbon from the iron. The amount of carbon removed from the iron determines the quality or grade of the steel produced. The above part of the process is monitored with care, until the proportion of carbon is reduced to an appropriate level, depending on the type of steel required. The converter slag, that is, the converter slag, has a fluidity that continuously moves, contains gaseous components, and varies widely during the conversion process. Thus, the collection of slag samples is generally difficult, and in some cases impossible with apparatus configured for slag from a smelter, i.e. for smelting slag.

The patent document WO 2011/047846 discloses that the comparison of the sampling process of all other slags, such as, for example, smelting slag and the like, And the problems are described. On page 2-13 of WO 2011/047846, there is a difficulty in obtaining a slag sample from a converter, and because of the poor fluidity of the slag, it is difficult to obtain a slag sample, for example, The problem is stated that the slag will not flow into the sample chamber with the inlet channel. For this reason, the sample chamber needs to have a large inflow opening. In the case of a sample chamber having a cross-sectional area determined by the internal cross-sectional area of the probe used to sample the sample with the sublance system, the size of the inlet opening is in the range of at least half the cross-sectional area of the sample chamber. However, in the case of large inlet openings, it is problematic to keep the slag in the sample chamber.

Nowadays, probes for collecting slag samples in a steelmaking furnace are typically multifunctional measurement probes that collect one or more slag samples, as well as one or more measurement elements to measure the properties of the molten metal during a single dipping process. In the case of obtaining only the converter slag sample, a wide inflow opening with a relatively large diameter can be selected for reliable converter slag collection, as taught in WO 2011/047846 and US 6,370,973.

In particular, it aims at collecting slag samples using at least a temperature measurement unit in the same sensor. The sensor is immersed in a molten metal bath using a sub-lance system. The processing vessel is a steel-making electric furnace, which is generally operated by using an upper-end air-blowing lance and a lower-end gas stirring portion.

However, a conventional immersion probe has at least a thermocouple, and thus only a limited space on the measurement head of the multifunctional measuring probe as described above, for example as illustrated in U.S. Patent No. 9,176,027, is available. Thus, the available space at the immersion end of the measuring head is not particularly sufficient to place the above-mentioned wide inlet opening, as taught in WO 2011/047846 and US 6,370,973, The mass may impair the accuracy of the temperature measurement of the molten metal bath.

The contents of the above cited patent documents are incorporated herein by reference. The above-described features known in the prior art can be combined alone or in combination with one of the aspects and embodiments of the invention disclosed below.

It is an object of the present invention to provide a more advanced apparatus and method for collecting slag samples and measuring molten metal parameters.

In order to solve the above problems, there is provided, in accordance with the independent claim, a method for collecting slag samples and measuring molten metal parameters, as well as an immersion apparatus for collecting slag samples and measuring molten metal parameters, according to the main claim do. Preferred embodiments are described in the dependent claims.

The above problem is solved by an immersion apparatus for collecting slag samples and measuring molten metal parameters, the immersion apparatus comprising an inlet conduit for sending the molten slag to the slag sample chamber, a measurement for measuring the parameters of the molten metal Wherein the inlet conduit comprises an outer portion and an inner portion and wherein both the inlet conduit and the measuring element are disposed in an upper region of the immersion end of the immersion device and / Wherein the molten slag enters the outer portion of the inlet conduit and passes through the inner portion of the inlet conduit and into the slag sample chamber during immersion in the molten slag in the immersion direction and then in the molten metal .

The present invention is based on the fact that the space available in the upper region side by side or next to the measuring elements of the measuring element - or of the measuring elements of a conventional multifunction measuring head for measuring the molten metal of the smelter - It can be sufficient to place it in the zone and / or to direct it in the immersion direction so that the inlet conduit can reliably collect a sample of molten slag in the converter without blocking or interfering with the measurement of the molten metal parameter .

The immersion apparatus is a device adapted to perform a dedicated function or to perform a dedicated function by entering molten slag and molten metal or immersed.

The molten metal is, in particular, molten iron. The molten metal has a temperature higher than 1000 占 폚 within the meaning of the present application. Molten iron generally has a temperature higher than 1500 ° C.

The collection of slag samples means that the molten slag enters or exits the immersion apparatus and is taken out of the furnace with the immersion apparatus for subsequent analysis.

Molten metal parameters refer to properties of the molten metal, such as current temperature, carbon content or concentration, and oxygen content or concentration. In particular, while the measuring element is exposed to the molten metal, the molten metal parameter is measured.

The inlet conduit for sending the molten slag to the slag sample chamber means an inlet channel that allows the molten slag to enter the interior of the immersing device and / or into the interior of the immersing device. In particular, the inlet conduit is a pipe or tube. The inlet conduit guides or transports molten slag into a slag sample chamber that is preferably at least partially received within the housing of the immersion apparatus. Preferably, the slag sample chamber collects and cools the incoming molten slag and / or fixes the solidified slag. Accordingly, the solidified slag does not cause contamination due to the previous sample upon withdrawal.

The housing generally refers to an embedding system.

The inner portion of the inflow conduit means a portion of the inflow conduit that is inserted into the housing.

The outer portion of the inlet conduit means the portion of the inlet conduit which is not inserted into the housing. In particular, the outer portion of the inlet conduit typically extends out of the housing and / or stand alone.

The measurement element for measuring the parameters of the molten metal generally comprises a sensor which generates a signal during exposure to the molten metal, the value of which corresponds to the properties or parameters of the molten metal being measured.

In particular, one or more, preferably two or three or more, or exactly two or three, measuring elements are provided. Thus, various molten metal parameters can be measured very efficiently and / or simultaneously.

The measurement element generally comprises an electrical contact or interface for transmitting a signal or data to an analysis unit or storage unit and / or for exchanging with an analysis unit or storage unit. The measurement element may comprise an electronic component or circuit for processing a signal or data. Thus, for example, a cable can be connected to the measuring element, for example in real time, to display measured parameters during immersion of the immersing device.

The immersing end of the immersing device refers to the end of the immersing device facing the molten slag during immersion in the immersing direction. In short, the immersion end is the end of the immersion device oriented in the immersion direction or toward the immersion direction.

The immersion direction is generally coaxial with the longitudinal axis of the immersion device. When the immersion device has a cylindrical or substantially cylindrical shape or has a curved surface, the longitudinal axis and / or the immersion direction preferably correspond to the respective central axes.

The immersion end of the immersion device includes a top and a side. The top includes a tip as the point or surface closest to the direction of immersion.

The top can be seen in the plan view, especially excluding the lateral boundaries. The side can be seen on the side view, especially excluding the top border.

Particularly, if the immersion end has a cylindrical shape, the upper end is a flat upper surface and the side surface is a curved surface.

The upper region is an area which is close to the upper surface or tip of the immersion apparatus in the immersion direction in the immersion apparatus and particularly includes the upper surface or tip of the immersion apparatus or is bounded by the upper surface or tip of the immersion apparatus. A region means a sector, region, or region, and thus includes a surface, not a surface, selectively.

In particular, the top region may be covered by the measuring head cap, and / or may be covered by the measuring head cap and / or the maximum outside diameter of the immersing device, such as a section or portion of the immersing device extending along the immersion direction and / Refers to a section or portion that has a smaller length, and / or has a length greater than the diameter of the inlet conduit. The maximum outside diameter is generally the maximum distance between two points of the curved surface of the immersion device before immersion.

In particular, the top region does not include side, curved, or radial surfaces.

In particular, the top region is delimited by the surface of the housing in the immersion direction, i.e. the longitudinal axis, and the top region is defined at the surface of the housing facing the molten metal bath or behind the surface of the housing And ends at the tip of the measuring head, i.e. at the highest point in the immersion direction.

In particular, the inlet conduits disposed in the top region are configured to collect molten slag from the top surface and not particularly from the side.

In particular, the inlet conduit and the measuring element, both of which are located in the upper region of the immersing end of the immersing device, are arranged inside the inner region of the surface of the housing, and cross the outer boundary or edge of the surface of the housing Lt; RTI ID = 0.0 > and / or < / RTI > Preferably, the surface is in the upper region. Preferably, the surface is a flat or substantially flat surface.

Preferably, the surface is oriented orthogonally or substantially perpendicular to the longitudinal axis and / or the immersion direction. In particular, the inlet conduit and / or the measuring element can pass the surface in the direction of immersion or substantially in the direction of immersion.

In particular, the measuring element disposed in the upper region is configured to measure molten metal parameters by being exposed to the molten metal at a top surface, rather than at a side surface.

In particular, the top surface is the existing top surface during immersion. Depending on the molten slag and / or the material currently exposed to the molten metal, the top surface may be changed due to the removal of the top surface material. In particular, the side is the same.

Being oriented in the direction of immersion means that it interacts with molten slag and / or molten metal in the immersion direction and is configured not to interact with molten slag or molten metal on the side.

The inlet conduit facing the immersion direction means that the opening of the inlet conduit is oriented in such a manner as to allow the molten slag to enter or flow into the inlet conduit opening, not from the side, but in the immersion direction.

It is not essential that the inlet conduit extends parallel to the direction of immersion. Nonetheless, the inlet conduit, which basically extends parallel or substantially parallel to the immersion direction, represents a preferred embodiment. In fact, the inlet conduit facing the immersion direction does not include an inlet conduit in which the opening for the introduction of the molten slag is located entirely on the side.

The measurement element facing the immersion direction means that the sensor of the measurement element is constituted or oriented in such a way that it interacts with the molten metal only in the immersion direction and / or measures the molten metal, not from the side.

As far as from the side, when it is measured for the inlet conduit and the measuring element, when the molten slag or the molten metal flows into the inlet conduit or its opening, or by being exposed to the measuring element or its sensor, . However, it does not include molten slag or molten metal, which can flow from the side to the top and reach the top within the meaning of "not from the side", measured by the measuring element or by the inlet conduit at the top do.

An immersion apparatus for collecting a slag sample and measuring molten metal parameters, said immersion apparatus comprising an inlet conduit for molten slag and a measuring element for measuring the parameters of the molten metal, Wherein both the inlet conduit and the measuring element are located in the upper region of the immersion end of the immersion apparatus and / or are oriented in the immersion direction, the immersion apparatus being characterized in that in the immersion direction, the molten slag Wherein the molten slag is configured to enter the outer portion of the inlet conduit and to be passed through the inner portion of the inlet conduit to the slag sample chamber during immersion in the molten metal The collection of converter melted slag and the measurement of molten slag can be achieved.

U.S. Patent No. 6,370,973, which is incorporated herein by reference, shows an embodiment in which there is no inlet conduit for the slag, including the outer portion in Figure 4. Also, the steel sample inlet is closed with a steel cap for protection from the slag at the tip, so that the immersion device of the above embodiment is not configured so that the molten slag can enter the outer portion of the steel sample inlet.

The slag collection is also about a very generous converter slag in terms of the positioning of the immersion device relative to the molten metal surface. In addition, a sample of pure slag can be obtained, pure molten metal can be measured, and high-precision analysis and measurement results can be obtained. In particular, the inflow conduit facing the immersion direction is prevented from being exposed to gases from the burning cardboard tube, thereby preventing contamination and obtaining a very pure slag fountain.

In one embodiment, the inlet conduit is configured to withstand molten slag but to melt when exposed to molten metal.

"Melting" means melting including liquefaction, melting, and / or melting and entering a solution.

Thus, the inlet conduit can transfer or guide the flow of molten slag into the chamber for storing the slag sample while passing through the slag layer. When the molten metal is reached, the inlet conduit is melted and the slag thus contained is allowed to flush away from the top region by the molten metal bath.

Accordingly, the molten metal measurement can be carried out with the effect of being mentioned or the presence or absence of impurities by the slag of the inlet conduit. In addition, very pure slag samples with little or no molten metal content can be collected.

Embodiments having an inlet conduit that is configured to allow the inlet conduit to withstand molten slag but to melt when exposed to the molten metal is characterized in that the converter slag is collected even with relatively small inlet conduits due to the immersion force, And that the division of slag sample collection and molten metal measurement into separate subsequent processes contributes further to significantly reducing the interference of the slag sample collection process and the molten metal measurement process.

If the inlet conduit is configured to allow the molten slag to withstand molten slag, but melts when exposed to the molten metal, the slag sample collection and molten metal measurement are divided into the individual subsequent processes described above.

Particularly, by melting and disappearing, the slag in the inlet conduit disappears and the inlet conduit is immediately eliminated.

Preferably, the inlet conduit is configured to melt when exposed to molten metal. Melting means that the inlet conduit melts to the surface of the housing.

This acts as a stopper for the slag sample chamber and helps to obtain a coherent melt of the inlet conduit which can reduce the slag escaping from the slag sample chamber and interfering with the molten metal measurement.

In one embodiment, the outer portion of the inlet conduit is self-supporting.

The term " stand-alone " means, for example, that it is not interposed in the housing, but is spaced primarily or entirely apart from adjacent members. The maintenance means or interfaces to the measuring head cap, which only make local contact with an area of less than 5% or 10% of the outer surface of the inlet portion of the inlet conduit, should not be considered.

By providing an outer portion of the inlet conduit which is self-supporting, an improvement in the melting of the inlet conduit is permitted.

In one embodiment, the inlet conduit is configured to be present during molten slag collection and to disappear during molten metal measurement. Thus, the slag does not interfere with the measurement element and the molten metal measurement.

In one embodiment, the immersion device comprises a measurement element cap covering the measurement element, wherein the measurement element cap is configured to melt the measurement element cap when exposed to the molten metal.

Covering means at least partially covering the measuring element or all measuring elements, especially towards the immersion direction. Preferably, the measuring element cap covers the sensor of the measuring element in the immersion direction.

Accordingly, the molten metal measurement can be carried out with the effect of the slag or the slag of the inlet conduit with or without the presence of impurities. In addition, the measuring element, in particular the sensor, is protected from material and other environmental conditions in the immersion device in the upper region before reaching the molten metal.

Preferably, the measuring element cap is configured to withstand molten slag.

In one embodiment, the immersion apparatus includes a metering head cap covering the top region of the immersion apparatus, wherein the metering head cap is capable of withstanding molten slag but is melted when exposed to molten metal. The measuring head cap serves to protect during transport, handling and significant impact. The wall thickness of such a cap is typically 0.8 mm. While it is in contact with the molten metal, it takes about one second to melt, while it may take several seconds to melt while in contact with molten slag. The sensor is inserted into the converter by mechanical means, typically at an entry speed of 30 to 60 cm / s. The sensor is held stationary for 6 to 8 seconds and then comes out at a speed of about 20 cm / s.

When the immersion apparatus is guided along the molten slag surface, the ambient heat of the metallurgical vessel raises the temperature of the measurement head cap of the immersion apparatus. Thus, the cap prevents the cooling effect on the slag.

Also, the slag is enabled to be guided into the slag cooling chamber, while the slag is prevented from approaching the measuring element or the measuring element cap. Thus, the obstacle to the measurement of the molten metal due to the interference of the slag can be prevented well.

Preferably, the measuring head cap is adapted to the inlet conduit, the measuring element cap and / or the measuring element. In one embodiment, when the inlet opening of the inlet conduit is at the same height as the top surface of the measuring head cap, or when the cap opening of the measuring head cap crosses the inlet opening of the inlet conduit, The end of the inlet opening of the inlet conduit may not be included.

In particular, the outer surface of the measuring element cap is only exposed to gas or has a gap or distance to the inlet conduit and / or the measuring head cap.

In particular, the measuring head cap forms a top surface or tip. Preferably, the measuring head cap has a length of at least 20% of the length of the device head in the immersion direction and / or longitudinal axis and / or at least 50% of the length of the device head, preferably at least about 30% Lt; / RTI >

In one embodiment, the longitudinal axis of the immersion device extends coaxially or substantially coaxially with the direction of immersion. The substantially coaxial relationship may include an angle in the range of -30 to +30 degrees.

Preferably, the inlet conduit, the measuring element cap and / or the measuring head cap are arranged, designed and / or designed such that when the inlet conduit melts or melts, the measuring element cap and / or the measuring head cap are melted or melted substantially at the same time or at the same time And / or configured. Thus, the at least one measuring element can be exposed to the molten metal bath in a state where there is no appreciable effect or impurity, or with the slag of the slag or inlet conduit.

If iron or steel is used as the metal, the inlet conduit, the measuring element cap and / or the measuring head cap are designed to melt at 1500 ° C or 1500 ° C.

In particular, the inlet conduit, the measuring element cap and / or the measuring head cap are made of metal, in particular of the same metal, to reduce production costs. The melting temperature can be adjusted by decreasing the thickness of the wall for lower melting temperatures and increasing the thickness of the wall for higher melting temperatures. Additionally or alternatively, to achieve the required melting temperature, certain classes and / or grades of metal may be selected.

Preferably, the inlet conduit, the measuring element cap and / or the measuring head cap are made of steel, more preferably of low carbon steel. Low carbon steel is particularly advantageous for use in steelmaking converters.

Preferably, the wall thickness of the inlet conduit, the measuring element cap and / or the measuring head cap is 0.5 mm or more and / or 3 mm or less, preferably 1.5 mm.

In particular, the measuring element cap and / or the measuring head cap have a conical body and / or a dome top. Very low material costs as well as very low flow resistance in molten slag and molten metal can be achieved.

In one embodiment, the cap opening of the metering head cap is configured so that molten slag can flow through the cap opening and into the inlet conduit.

This makes it easy to collect the slag very reliably.

In one embodiment, the measuring head cap is at the same height as the inlet conduit in the immersion direction, or covers the inlet conduit in the immersion direction.

Covering the inlet conduit may also cause the inlet opening to remain uncovered, e.g., due to the cap opening.

This makes it easy to collect the slag very reliably.

In an alternative embodiment, the inlet opening extends, protrudes and / or emerges out of the measurement head cap in the direction of immersion.

In one embodiment, the inlet conduit has an inlet opening that is raised toward the immersion direction relative to the measuring element, and / or extends above the immersion face of the housing. In other words, during the dipping, the inlet opening will lead to the molten slag surface of the molten metal bath ahead of the measuring element.

Thereby the premature cooling of the liquid slag by the measuring element can be reduced, thereby improving the ability of the molten slag to flow through the inlet conduit.

In one embodiment, the cap opening and / or the measuring head cap are disposed adjacent the inlet opening and / or the inlet conduit. Preferably, the cap openings and / or inflow openings are aligned in a coaxial relationship and / or are disposed on top of each other and / or intersect with each other.

In one embodiment, the inflow opening, and thus the inflow conduit opening, in the immersion direction has a size greater than or equal to the cap opening.

In one embodiment, the inlet opening and the cap opening are arranged such that there is a minimum clearance between the outer surface and / or the curved surface of the inlet conduit and the measuring head cap and / or the cap opening.

Thus, as the measuring head cap breaks through the molten slag, the fluid pressure of the molten slag applied to the measuring head cap is directed into the inlet conduit and hence the flow of liquid molten slag entering into the slag sample chamber.

In one embodiment, a housing is provided for interposing an interior portion of the inlet conduit, in particular an entire slag sample chamber, and / or at least a portion of the measuring element, including an end opposite the inlet opening.

In particular, such a housing is configured to sandwich an interior portion of the inlet conduit with at least a portion of the slag sample chamber, in particular the entire slag sample chamber, and / or the measuring element.

A very robust immersion apparatus with very high functionality can be secured.

In one embodiment, the housing comprises sand, resin sand and / or cement as backfill material. Heat and / or fire. To provide the required three-dimensional shape, the backfill material may be attached together or housed in a container. Thus, it is possible to achieve fixing of the embedded component and facilitating cooling of the slag sample.

In one embodiment, the inlet conduit is connected to the housing using cement. A heat-resistant connection can be obtained directly.

In one embodiment, the slag sample chamber for cooling and anchoring the slag is made of a material selected from the group consisting of 2 < RTI ID = 0.0 >Lt; / RTI > half shells.

Preferably, the slag sample vessel is at least partially contained within the device head.

In an embodiment, the sensor of the measuring element and / or the measuring element cap are arranged at a distance from the slag sample container in the immersion direction. In another embodiment, the measurement element overlaps the slag sample vessel in the immersion direction, and the measurement element extends beyond the upper end of the slag sample vessel in the immersion direction.

Both embodiments help facilitate the separation of the slag collection process and the molten metal measurement process.

In one embodiment, the slag sample chamber is fabricated or includes metal such as metal and / or ceramic, preferably deep drawn galvanized steel or the like. This helps to cool the molten slag and prevents destruction of the slag sample chamber.

In one embodiment, the outer portion of the inlet conduit is surrounded by gas from the housing in the immersion direction prior to immersion. In this embodiment, pre-immersion means that the tip of the immersion device does not reach the molten metal surface. The inlet conduit from the housing in the direction of immersion refers to the external portion of the inlet conduit, i. E., The portion of the inlet conduit which is above the surface of the housing or housing in the immersion direction.

The inlet conduit may melt, melt, and / or melt very quickly.

Preferably, the outer portion of the inlet conduit has a funnel shape. This supports effective inflow of molten slag.

Preferably, at least half or most of the outer portion of the inlet conduit in the immersion direction is adjacent to the same height or longitudinal position relative to the measuring element or portion of the measuring element.

Preferably, the diameter of the outer portion of the inlet conduit is less than 30% of the diameter of the measuring head, which is configured to permit the ingress of molten slag, i. E., Without a protective cap to prevent entry of molten slag.

In one embodiment, the inlet conduit has a diameter of at least 15% of the maximum cross-sectional area of the immersion device. In particular, the maximum cross-sectional area corresponds to the maximum outer diameter or outer diameter of the device head in the interface area to the maximum outer diameter of the immersion device, in particular to the cardboard tube which is the carrier tube for holding the device head of the immersion device during immersion. In particular, the maximum outer diameter of the immersion apparatus is 50 mm or more and / or 80 mm or less.

In one embodiment, the inlet conduit is shorter than the slag sample chamber, in particular at least half the length of the slag sample chamber and / or at most has the same length as the slag sample chamber.

In one embodiment, the inlet conduit has an internal volume of at least 10%, preferably at least 20%, and / or at most 100%, preferably at most 50% of the internal volume of the slag sample chamber, It has an internal volume.

The two embodiments described allow for the collection of a sufficiently large sample of slag sample from the surface of the molten metal in a reliable manner.

In one embodiment, the outer portion that is not interposed in the inlet conduit and / or is self-supporting is longer than the interposed inner portion of the same inlet conduit and / or is longer than the measuring element cap.

In one embodiment, the inlet conduit has an inlet opening that is in or in the direction of dipping, particularly during or during the transfer of molten slag to the slag sample chamber.

Thus, the inlet opening is in front of and is not exposed to gas, for example, from a burning cardboard tube, thereby preventing contamination of the collected slag sample. A very accurate analysis result of the slag can be obtained.

In one embodiment, the inlet conduit and the measuring element and / or the inlet conduit and the measuring element cap are arranged side by side or next to each other in the direction of immersion so that both have a cross section perpendicular to the longitudinal axis and / , Preferably a section within the upper region of the immersion device.

Thus, reliable sampling and measurement can be achieved.

Preferably, the inlet conduit in the longitudinal section is disposed on one side of the longitudinal axis and on the other side of the longitudinal axis. The longitudinal sections are orthogonal to the transverse section. The longitudinal section is parallel to the longitudinal axis. The cross section is perpendicular to the longitudinal axis.

In one embodiment, the vent channel is in gas communication with the slag sample chamber.

Accordingly, the molten slag flows into the inlet conduit and the slag sample chamber, especially in the case of converter slag.

In one embodiment, the immersion apparatus comprises a device head comprising a slag sample chamber, an inlet conduit and / or a measurement element. The device head generally further comprises a measurement head cap.

In one embodiment, the immersing device comprises a carrier tube for holding the device head or a cardboard tube as a carrier tube, the device head comprising a slag sample chamber, an inlet conduit and a measurement element.

Accordingly, a multifunctional immersion probe suitable for a subclause system used in a smelter and a converter can be provided.

In one embodiment, the maximum outer diameter of the measuring head is less than or equal to the maximum outer diameter of the carrier tube. In particular, the maximum outer diameter of the measuring head is less than or equal to the outer diameter of the carrier tube at the interface with the device head.

Thus, a very compact sub-lance probe can be provided.

Preferably, the measuring head has interfacing means for connecting the carrier tube to hold the device head of the immersion device during immersion. In particular, the interface means may be a recess or protrusion, preferably in a circumferential direction. This allows the device head to be quickly removed from the immersed end of the carrier tube, thereby preventing the carrier tube from cutting or fracturing to remove the solidified slag sample.

In one embodiment, a cardboard tube having an outer diameter of at least 50 mm and / or 80 mm or less is used as the carrier tube for holding the measuring head of the sub-lance probe during immersion.

In one embodiment, a control unit for controlling the feeding unit and / or the feeding unit for feeding the immersing device is provided in an automated or semi-automated manner to collect the slag sample and / or to perform the molten metal measurement / RTI >

In one embodiment, a sub-lance probe available for measuring the metallurgical properties of the molten metal during smelting is adapted to include an inlet conduit and a slag sample chamber to collect the slag sample. An immersion apparatus for taking a slag sample that can be made at low cost as part of a sub-lance system using a sub-lance probe known to those skilled in the art to measure the metallurgical properties of the molten metal during smelting can be obtained.

Preferably, the inlet conduit and the measuring element and / or the inlet conduit and the measuring element cap are spaced apart from one another and thus are not in direct contact, in particular by a distance which is half the diameter of the inlet conduit or measuring element cap or measuring element housing I have left.

Preferably, the inlet conduit, the measuring element and / or the measuring head cap extend parallel or substantially parallel to the immersion direction and / or the longitudinal axis.

In one embodiment, an immersion apparatus for obtaining a slag sample from a container of molten metal and slag to measure the metallurgical properties of the molten metal comprises: one or more measuring elements for determining the metallurgical properties of the molten metal; A sample chamber for receiving and cooling the slag sample and a sample chamber for cooling the slag sample, the sample chamber being capable of dissolving in the molten metal and passing over the slag layer, Lt; RTI ID = 0.0 > inlet conduit. ≪ / RTI >

It is thus possible to provide a multifunction measuring device capable of obtaining a slag sample from the surface of molten metal in a reliable manner, through a small inlet conduit open to the slag layer in the immersion direction, which provides a sufficiently large sample .

Another aspect of the invention is a method of collecting slag samples and measuring molten metal parameters, wherein an immersion device, in particular an immersion device as described above, is immersed in the molten metal through the layer of molten slag in the immersion direction, During the immersion through the layer of molten slag, the molten slag flows into the inlet conduit which is directed in the direction of immersion and directs the molten slag to the slag sample chamber, and at the moment when it reaches the molten metal, The measuring head cap and the inlet conduit are melted so that the measuring element is exposed to the molten metal and the cap covering the measuring element facing the immersing direction is also melted.

Preferably, the dipping is continuous movement, continuous feeding or continuous operation until reaching the molten metal. When reaching the molten metal, this movement, feeding or movement can be stopped for a while before the immersion device is taken out, especially as a continuous movement, feeding or operation.

In general, the immersion speed is such that the measurement element is exposed to the molten metal in order to basically measure the molten metal parameter at the same moment as it reaches the molten metal, The cap and the inlet conduit are then selected in such a way that the cap covering the measuring element is melted or melted in particular.

The definition and embodiment of the immersion device also applies to the method described above.

Reliable slag collection and molten metal measurements are also achieved in the converter. Additional advantages have already been described in the context of immersing devices.

The features of each embodiment as well as the features of the above description and the features of the drawings may be combined with one another and combined with the aspects of the present invention and the subject matter of each claim.

All combinations of one or more embodiments and / or aspects of the present invention with one or more of the claims are disclosed herein.

The details and additional advantages are provided in the following description of the drawings, which show preferred embodiments and preferred embodiments with respective elements.

Figure 1 shows a measuring head in which one or more measuring elements are mounted on a carrier tube, the inlet conduit extending from the slag sample chamber to the outside of the measuring head cap.
Fig. 2 shows a device head in which an inverted conical inflow conduit extends from the slag sample chamber to the measurement head cap, with another embodiment of the device head in which one or more measurement elements are mounted to the carrier tube.
3 is a view showing a measuring head in which a measuring head cap is cut out, in which the measuring head is oriented toward the immersion direction and points to each layer of melted slag and molten metal.

The immersion apparatus 10, 20 shown by way of example in FIGS. 1, 2 and 3 collects a slag sample from a metallurgical vessel containing a layer 18 of molten slag floating on the molten metal 19 The immersing device comprises one or more measuring elements 1, 21 (in the housing 14, 34 in Figures 1 and 2) for determining at least one characteristic, i.e. a parameter, of the molten metal 19 And a measuring head 2, 22 on which the measuring head 2 is mounted.

The measuring heads 2 and 22 are provided with slag sample chambers 7 and 27 for receiving, cooling and holding slag samples using inlet conduits 5 and 25.

In one embodiment, the inlet conduits 5, 25 extend from the chamber openings of the slag sample chambers 7, 27 to the boundary of the measurement head caps 4, 24.

The measuring head caps (4, 24) substantially cover the measuring heads (2, 22). The measurement heads 2 and 22 are attached to carrier tubes 3 and 23, for example the soak end of a cardboard tube, which carries the measuring head facing the immersion direction 19 onto the molten metal 19 Through the layer 18 of molten slag which is floating, and to guide it into the molten metal 19.

When the measuring head is guided towards the molten slag surface, the ambient heat of the metallurgical vessel raises the temperature of the measuring head cap (4, 24), thereby preventing the cooling effect of the measuring head cap on the slag. The measuring head caps (4, 24) of the immersion device have cap openings (9, 29).

In one embodiment, the cap openings 9, 29 are provided by tapes 8, 28, in particular with a thickness of preferably less than 1 mm and / or a thin tape comprising or made of paper and / It is covered by.

The tapes are particularly adapted to burn immediately when exposed to the heated environment of the metallurgical vessel so that it is possible to protect the inlet conduits 5, 25 and the measuring elements 1, 21 from contamination and pollution before immersion .

In one embodiment, the inlet conduits 5, 25 and / or the slag sample chambers 7, 27 have a linear shape and / or are preferably designed to be rotationally symmetrical over their entire length.

The axes of the cap openings 9, 29 and the inlet conduits 5, 25, that is, the long central axis, directly face the layer 18 of molten slag.

Upon immersion, the molten slag 18 is pressed into the inlet conduits 5, 25 as the device head is propelled toward the molten metal 19 in the immersion direction 17. The inlet conduits 5, 25 send molten slag 18 to the slag sample chambers 7, 27 for cooling.

The immersion process towards the molten metal 19, rather than stopping the immersion process and collecting the molten slag 18, continues unimpeded. The slag inlet conduits 5, 25 are made of a thin metal that melts relatively quickly when exposed to molten metal 19, but this inlet conduit remains intact while passing through the molten slag layer.

When the immersion device head moves into the molten metal 19 the measuring head protective caps 4 and 24 and subsequently the measuring element caps 12 and 32 are substantially dissolved at the same time as the inlet conduits 5 and 25, Whereby at least one measuring element is exposed to the molten metal bath.

Thus, the measuring element 1, 21 or the measuring elements 1, 21 can determine the properties of the molten metal without being influenced by the presence of the slag inlet conduits 5, 25 thermally and chemically. The transient nature of the dissolvable slag inlet conduits 5 and 25 provides a means for sending a sample of the liquid slag 18 to the cooling slag sample chambers 7 and 27 during immersion through the slag layer, Does not interfere with the subsequent measurement of the molten metal (19) when molten in the metal (19).

In one embodiment, the slag sample chambers 7, 27 have a larger diameter than the inlet conduits 5, 25 and / or the inlet conduits 5, 25 are located in the upper portion of the slag sample chambers 7, Inserted or surrounded by this upper part. The molten slag 18 is guided very firmly into the slag sample chambers 7, 27.

In one embodiment, the slag sample chambers 7, 27 include narrowed portions 15, 35, i. E. Waist, as stoppers for the inlet conduits 5, 25 during assembly. A very simple assembly is achieved.

Fig. 3 is a specially multifunctional immersion device showing an immersion device pointing towards each layer of molten slag and molten metal oriented in the direction of immersion and contained in a metallurgical vessel, and the metallurgical vessel itself is not shown. Terms; The term " immersion direction "or" immersion end "or" towards immersion " In other words, the measuring device needs to be inserted into the molten metal so that the properties of the molten metal, such as temperature, oxygen content and carbon content, can be measured by solidification means or by collecting a solid metal sample for analysis have. When the slag is floating on the molten metal, the measuring device 10 must first pass the molten slag in order to measure the properties of the molten metal.

1 is a multifunctional measuring device 10 for collecting slag samples and measuring molten metal parameters, preferably a multifunctional measuring device 10 comprising a housing 16 made of resin sand and / or a ceramic material and a device head 2 Show devices. The device head 2 is attached to the immersion end of the carrier tube 3.

In particular, the carrier tube 3 is typically a cardboard tube having a thick wall and an outer diameter of 50 to 80 mm. The slag sample chamber 7 for receiving the sample of molten slag 18 is within the housing 16 and / or is partially surrounded by the housing.

The slag sample chamber (7) is vented by an exhaust conduit or vent channel (13). The slag sample chamber 7 is generally provided with two matching halves 7a and 7b which are joined by a tape 7c and / or a metal spring clip 27c (not shown in FIG. 1) And / or ease of use and handling. The material of the matching half body is typically a metal, a ceramic and / or a mixture thereof.

Both the inner shape and the outer shape of the assembled slag sample chamber 7 are not unique to the present invention and can be configured in various shapes and sizes known to those skilled in the art. The slag sample chamber 7 has a chamber opening in its immersion direction 17 for receiving a slag inlet conduit 5 which is connected to the housing 16 by means of a refractory cement 6, .

The slag inlet conduit 5 extends from the slag sample chamber 7 to the cap opening 9 of the measurement head cap 4. In particular, the measuring head cap 4 is made of a metal that is not melted when it contacts the molten slag 18 but is easily melted when it contacts the molten metal 19.

The inlet opening of the inlet conduit as well as the cap opening 9 of the head cap 4 of the immersing device are covered by the tape 8. [

Thus, in one embodiment, which is not specific to any of the illustrated embodiments, when the metering head cap 4 penetrates the molten slag 18, the fluid of the molten slag 18 applied to the metering head cap 29 and the inlet conduits 5, 25 so that the pressure is directed into the inlet conduits 5, 25 and thus the flow of liquid slag 18 entering the slag sample chambers 7, 25 and the cap openings 9, 29 are arranged so that there is a minimum clearance between the outer walls of the slag inlet conduits 5, 25.

Preferably, the inlet conduit 5 is a metal, and more preferably it is a low carbon steel in the example of the apparatus of the present invention used for steel making. The wall thickness of the inlet conduit 5 is generally 0.5 mm to 3 mm, preferably 1.5 mm. The internal volume of the slag inlet conduit 5 is 10% to 100%, preferably 20% to 50%, more preferably 23% of the internal volume of the slag sample chamber 7.

When the measuring head is further pushed into the molten metal bath through the slag layer, the measuring head cap 4 and the inlet conduit 5 are melted. In order to connect the inlet conduit 5 to the housing 16 and thus to the surface of the housing 16 in the dipping direction 17 the inlet conduit 5 is directed towards the housing 16, (6). Thereafter, the measurement element cap 12 is melted to expose at least one molten metal metrology element 1 (not shown) received in the housing 14.

The electrical signals from the measuring elements 1 and 21 or the measuring elements 1 and 21 are transmitted from the contacts 11 and 31 to the remote instrument 10 and 20 in both embodiments of the immersion apparatus 10, In particular, by a wiring (not shown).

After measuring the properties of the molten metal 19, the carrier tubes 3, 32 and the attached measuring heads 2, 22 are withdrawn from the metallurgical vessel.

During withdrawal, the slag sample chamber 7 holds the slag sample and is removed from the measuring head 2 and the carrier tube 3 in the immersion direction 17. In particular, the immersion direction 17 is parallel to the longitudinal axis 37 of the measuring head 2, which in particular has a curved surface and / or a substantially cylindrical shape. Preferably, the outer curved surface of the measuring head 2 is flush with the outer curved surface of the carrier tube 3.

2 shows another embodiment of a specially multifunctional immersion device 20 for collecting slag samples and measuring molten metal parameters, preferably a housing (not shown) made of resin sand but also of ceramic material or mixtures thereof 36 and a measuring head 22. As shown in Fig. The measurement head 22 is attached to the immersion end of the carrier tube 23. The measuring head 2 has a portion facing the immersion direction 17 and extending outwardly and having a portion facing the immersion direction and being in the carrier tube 23. In particular, the immersion direction 17 is parallel to the longitudinal axis 37 of the measuring head 22, which in particular has a curved and / or substantially cylindrical shape. Preferably, the outer curved surface of the measuring head 22 is flush with the outer curved surface of the carrier tube 23.

In particular, the carrier tube 23 is typically a cardboard tube having a thick wall and an outer diameter of 50 to 80 mm. The slag sample chamber 27 for receiving the sample of molten slag 18 is in the measuring head 22 and / or partially surrounded by the measuring head. The slag sample chamber 27 may be vented by an exhaust conduit or vent channel 33. The slag sample chamber 27 is formed by two matched halves 27a, 27b which are typically joined by metal spring clips 27c, in particular in a clamshell manner and / or with ease of use and handling.

In one embodiment, the slag sample chamber 27 has two sections along the longitudinal axis 37 having different diameters.

Preferably, the predetermined section in the immersion direction has a larger diameter than the other sections. This makes it possible to easily provide the circumferential stepped portion 27d, the shoulder portion or the protruding portion, which is placed on the edge of the measuring head 22 or the housing 36. [

The gap surrounding the other section of the slag sample chamber 27 is thus located at one end of the slag sample chamber 27, in particular at one end opposite to the immersion direction 17, with the two halves 27a, 27b To clip the clip 27c together.

The material of the matching halves 27a, 27b is typically a mixture of metals, ceramics and / or some metals, some ceramics. Both the internal shape and the external shape of the assembled slag sample chamber 27 are not unique to the present invention and may be configured in various shapes and sizes known to those skilled in the art.

The slag sample chamber 27 has a chamber opening in its immersion direction 17 for receiving a slag inlet conduit 25 which is connected to the measuring head 22 or housing 36 by refractory cement 26).

The slag inlet conduit 25 extends from the slag sample chamber 27 to the cap opening 29 of the measurement head cap 24. The measuring head cap 24 is preferably made of a metal that is not melted when it contacts the molten slag 18 but is easily melted when it contacts the molten metal 19.

The cap opening 29 of the measuring head cap 24 is covered with a tape 28 which is particularly thin and / or comprises and is made of paper and / or plastic.

In particular, the slag inlet conduit 25 is of an inverted conical shape, and preferably the immersion end is larger than the opposite end adjacent the chamber opening.

In one embodiment, the immersion end of the inlet conduit 25 is larger than the cap opening 29 of the measuring head cap 24 and / or meets the measuring head cap 24.

Thus, in one embodiment, which is not specified in any of the illustrated embodiments, when the measuring head cap 4, 24 penetrates the molten slag 18, the molten slag 18, which is applied to the measuring head cap, The fluid pressure of the measuring head cap 4,24 and the inlet conduit 22 is directed so as to direct the flow of liquid slag 18 into the inlet conduits 5,25 and thus into the slag sample chambers 7,27. The slag inlet conduits 5, 25 are arranged such that there is a minimum clearance between the ends of the slag inlet ports 5,

Preferably the inlet conduit 25 is metal, more preferably steel. Preferably, the inlet conduit 25 is a metal, and more preferably it is a low carbon steel in the example of the apparatus of the present invention for use in a steel making furnace. In particular, the wall thickness of the inlet conduit 25 is 0.5 mm to 3 mm, preferably 1.5 mm. Preferably, the internal volume of the slag inlet conduit 25 is between 10% and 100%, preferably between 20% and 50%, more preferably 23% of the internal volume of the slag sample chamber 27.

The measuring head 22 is connected to the inlet conduit 25 and thus to the surface of the housing 36 in the immersion direction 17 when the measuring head 22 is further pushed into the molten metal bath through the slag layer 6, the inlet conduit 5 melts into the housing 16.

In particular, immersion apparatus can be used in converter and smelter systems, but can be used in other metal smelting vessels such as electric arc furnaces, but not in blast furnaces.

In general, a standard sub-lance sensor, which is also an exemplary representation for the immersion device or measurement head of the present invention, is expected to have a package of capping. Most sensors have a plurality of caps. The smallest cap serves to protect against impact and handling during the assembly phase of the sensor.

The wall thickness of such a cap is typically about 0.2 mm. It takes several seconds to melt only when in contact with the slag. When it is in contact with the steel, it takes about 0.2 seconds to melt. The outer large caps (4, 24) serve to protect during transport and handling of the sensor and to protect against further impact. The wall thickness of this cap is about 0.8 mm. If it is in contact with the slag, it takes several seconds to melt. When it is in contact with the steel, it takes about 1 second to melt.

The sub-lance sensor is often expected to have means for preventing the slag from sticking to the cap. An additional paper cap is the most commonly used protection.

Preferably, a thin Zn coating (5 占 퐉) may be used which evaporates when the cap reaches 907 占 폚. This creates a lot of gas that causes a small explosion to blow up all the slag stuck to the cap.

The slag sample preferably weighs about 30 g, resulting in a volume of about 20 cc. The range for the weight and / or volume may be +/- 10% or +/- 20%.

The sub-lance sensor is generally designed to withstand one measurement cycle. This means that the sensor moves at a rate of entry of typically 30 to 60 cm / s in the molten metal bath, stays stationary for 6 to 8 seconds, and then comes out at a rate of 20 cm / s.

The typical immersion depth in the steel is about 40 cm, and the layer of slag is about 30 cm when no bubbles are generated. In general, if bubbling is occurring, it can reach several meters.

Based on these values, the sensor will move through the slag for about one second, continue to move to its deepest position for 1.5 seconds, stay stationary for 6 seconds, return to the surface of the molten metal bath for 1.5 seconds It will move up.

The thermocouple records the temperature in a continuous manner during the entire immersion time. This allowed the sensor to accurately interpret the temperature after it reached its deepest position, and the thermocouple thermal contacts were heated to the temperature of the molten metal bath. This is typically after 3-4 seconds at the stop position.

All thermal masses, such as sample inlet, etc., cause the molten metal bath to become unstable by cooling. The present invention uses, in one embodiment, an inlet that dissolves in the molten metal bath immediately after the outer cap is opened and does not affect the thermal conditions of the molten metal bath.

During the immersion of the sensor, as soon as the tip of the sensor touches the slag layer for the first time, all of the gas in the charge path of the slag sampler will begin to heat and expand, and when fully heated, the volumetric factor is 6. This gas expansion causes back pressure in the slag sampler, but this back pressure will be considered very low due to dipping. As a result, the inflation gas tends to repel the slag in the molten metal bath.

Since the slag can only be collected while moving through the slag layer, it is desirable that a great deal of ventilation is required. This venting needs to be done as much as possible under conditions that do not form a hole that allows the slag to flow out of the sample cavity.

The wall thickness of the inlet conduit needs to be selected according to the wall thickness of the outer steel cap. It is preferred that the wall thickness of the inlet conduit be less than or equal to the wall thickness of the cap.

The volume of the conduit should be as large as possible, as long as the enclosed air can escape through the vent. As an example, more than 10% and / or not more than 100%, especially 20% to 50% is preferred.

It is also contemplated that the air vents of the inlet conduit are all beneficial in minimizing pressure rise during immersion.

Numerous modifications and variations are within the above described embodiments, and are in accordance with aspects of the present invention and the embodiments described herein, and are thus within the scope of the present invention. In some instances, some features of the invention may be used without corresponding use of other features. Accordingly, it is appropriate that the above description is to be construed broadly and as being provided only as illustrative and exemplary.

Claims (14)

An immersion apparatus (10, 20) for collecting slag samples and measuring molten metal parameters, the immersion apparatus (10, 20) comprising an inlet conduit (5) for sending molten slag (18) to the slag sample chambers And a measuring element for measuring a parameter of the molten metal and wherein the inlet conduit comprises an external part and an internal part and the inlet conduit Both the measuring elements 1 and 21 are arranged in the upper region of the immersion end of the measuring heads 2 and 22 and face the immersion direction 17 and in the immersion direction 17 the molten slag 18 The molten slag 18 enters the outer portion of the inlet conduits 5 and 25 and passes through the inner portion of the inlet conduits 5 and 25 to the slag 18, The immersion devices 10 and 20 are configured to be sent to the sample chambers 7 and 27 and the inlet conduits 5 and 25 are connected to the molten slag 18 An immersion device can deal, but when it is exposed to the molten metal 19, the inlet conduit (5, 25) that is configured to melt. The immersion device (10, 20) according to claim 1, characterized in that the external part of the inlet conduit (5, 25) is self-standing. 3. The apparatus according to claim 1, further comprising a measuring head cap (4, 24) for covering the upper region of the immersion apparatus (10, 20), the measuring head cap (4, 24) being able to withstand the molten slag Characterized in that the measuring head cap (4, 24) is configured to melt when exposed to the molten metal (19). A method as claimed in claim 3, characterized in that the cap openings (9, 29) of the measuring head caps (4, 24) are arranged such that molten slag (18) can flow through the cap openings (9, 29) (10, 20). ≪ / RTI > 5. Method according to claim 4, characterized in that the measuring head cap (4, 24) is at the same height as the inlet conduits (5, 25) in the immersion direction (17) or covers the inlet conduits (10,20). ≪ / RTI > The immersion apparatus (10, 20) according to claim 1, characterized in that the inlet conduits (5, 25) have inlet openings oriented in the direction of immersion (17). The immersion apparatus according to claim 1, further comprising a housing for sandwiching at least one of the inner portion of the inlet conduit (5, 25) and the slag sample chamber (7, 27) , 20). 8. Immersion device (10, 20) according to claim 7, characterized in that the external part of the inlet conduits (5, 25) is surrounded by gas from the housing (16) in the immersion direction (17) before immersion. The immersion apparatus (10, 20) according to claim 1, characterized in that the inlet conduits (5, 25) and the measuring elements (1, 21) are arranged side by side in the immersion direction (17). The immersion apparatus (10, 20) according to claim 1, characterized in that the inlet conduits (5, 25) have a diameter of at least 15% of the maximum cross-sectional area of the immersion apparatus (10, 20). The immersion apparatus (10, 20) according to claim 1, characterized in that the inlet conduits (5, 25) have an internal volume of not less than 10% and not more than 100% of the internal volume of the slag sample chambers (7, 27). The immersion apparatus (10, 20) according to claim 1, characterized in that the vent channels (13, 33) are in gas communication with the slag sample chambers (7, 27). A method according to claim 1, characterized by the fact that the carrier tubes (3, 23) for holding the measuring heads (2, 22), which comprise the slag sample chambers (7, 27), the inlet conduits (5, 25) and the measuring elements ) Or a carrier tube (3, 23). ≪ RTI ID = 0.0 > 11. < / RTI > A method for collecting a slag sample and measuring molten metal parameters comprising the steps of immersing the immersion apparatus in an immersion direction in a dipping direction through a layer of molten slag into a molten metal, During the immersion through the layer of slag 18 the molten slag 18 is introduced into the inlet conduits 5 and 25 which are oriented in the direction of immersion 17 and which direct the molten slag 18 to the slag sample chambers 7 and 27 The measuring elements 1 and 21 are exposed to the molten metal 19 in order to measure the molten metal parameters at the moment the molten metal 19 reaches the molten metal 19 ), The inlet conduits (5, 25) and the caps (4, 24, 12, 32) covering the measuring elements (1, 21) towards the immersion direction are also melted.

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